Hedging Activities - Schedule of Derivative Financial Instruments in Consolidated Balance Sheet (Detail) - Designated as Hedging Instrument [Member] - Interest Rate Swaps [Member] $ in Thousands	Dec. 31, 2016 USD ($)
Derivatives Fair Value [Line Items]
Total derivatives designated as hedging instruments	$ 14,172
Other Long-Term Assets [Member]
Derivatives Fair Value [Line Items]
Total derivatives designated as hedging instruments	14,528
Accrued Expenses [Member]
Derivatives Fair Value [Line Items]
Total derivatives designated as hedging instruments	$ (356)

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant